I have a few assumptions I would like to test about viral data. Would anyone be familiar with published papers that have experimentally (or somehow) determined the percentage of viral sequences in the data? I have looked into some HMP samples but couldn't that list the percentage of virus explicitly.
An example of what I am looking for: paper sequenced a metagenomic sample from a cheek swab (e.g. using Illumina short-reads) and mentioned in the paper that the percentage of viral reads were 0.001%.
Thanks in advance.